Java – serialize an object with a non serializable parent class

How does the following code work?

class A {
         int a = 10;
     }


     class B extends A implements Serializable{

      }



     public class Test {
       public static void main(String[] args){
        B obj = new B();
        obj.a = 25;


        //Code to serialize object B  (B b= new B()),// deserialize it and print the value of 'a'. 
      }
    }

Even if I change the value of 'a' in the code, the code will print 10

Any explanation for this behavior?

Solution

The default value for a is 10 – it is set to 10 when creating objects If you want to do an actual test, set it to a different value after instantiation, and then serialize it

As for your update - if a class is not serializable, its fields will not be serialized and deserialized Only serialized subclass fields